public static bool DragDropSource(string name, ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags)
{
if (ImGui.BeginDragDropSource(flags))
{
s_dragdropDataD[0] = (byte)window;
s_dragdropDataD[1] = (byte)tree;
Util.GetBytesGC0(handleIdx, ref s_tmpBytesForShort);
Array.Copy(s_tmpBytesForShort, 0, s_dragdropDataD, 2, 2);
IntPtr dataPtr;
unsafe
{
fixed(byte *native = &s_dragdropDataD[0])
{
dataPtr = (IntPtr)(native);
}
}
ImGui.SetDragDropPayload(payloadType, dataPtr, s_dragdrop_size);
ImGui.Text(name);
ImGui.EndDragDropSource();
return(true);
}
return(false);
}
public void DragDropWindowRemove()
{
if (DragDropWindow != null)
{
DragDropWindow.Close();
DragDropWindow = null;
}
}
public static bool DragDrop(string name, ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags,
Action <DragDropWindow, DragDropTree, ushort,
DragDropWindow, DragDropTree, ushort> action)
{
bool ret = DragDropTarget(handleIdx, window, tree, payloadType, flags, action);
DragDropSource(name, handleIdx, window, tree, payloadType, flags);
return(ret);
}
private static void OnDragDropFromHierarchy(DragDropTree treeS, ushort handleIdxS,
DragDropWindow windowT, DragDropTree treeT, ushort handleIdxT)
{
switch (windowT)
{
case DragDropWindow.Hierarchy:
OnDragDropFromHierarchyToHierachy(treeS, handleIdxS, treeT, handleIdxT);
break;
default:
Debug.LogError("未处理");
break;
}
}
public static void OnDragDropAction(
DragDropWindow windowS, DragDropTree treeS, ushort handleIdxS,
DragDropWindow windowT, DragDropTree treeT, ushort handleIdxT)
{
switch (windowS)
{
case DragDropWindow.Hierarchy:
OnDragDropFromHierarchy(treeS, handleIdxS, windowT, treeT, handleIdxT);
break;
default:
Debug.LogError("未处理");
break;
}
}
public static bool DragDropTarget(ushort handleIdx,
DragDropWindow window, DragDropTree tree,
string payloadType, ImGuiDragDropFlags flags,
Action <DragDropWindow, DragDropTree, ushort,
DragDropWindow, DragDropTree, ushort> action)
{
bool ret = false;
if (ImGui.BeginDragDropTarget())
{
var payload = ImGui.AcceptDragDropPayload(payloadType, flags);
unsafe
{
if (payload.NativePtr != null)
{
IntPtr dataSource = payload.Data;
System.Runtime.InteropServices.Marshal.Copy(dataSource, s_dragdropDataE, 0, s_dragdrop_size);
DragDropWindow windowSource = (DragDropWindow)s_dragdropDataE[0];
DragDropTree treeSource = (DragDropTree)s_dragdropDataE[1];
ushort handleIdxSource = 0;
unsafe
{
fixed(byte *pbyte = &s_dragdropDataE[2])
{
handleIdxSource = *((ushort *)pbyte);
}
}
if (action != null)
{
action(windowSource, treeSource, handleIdxSource,
window, tree, handleIdx);
}
ret = true;
}
}
ImGui.EndDragDropTarget();
}
return(ret);
}